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HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1165 (ENGINE CONTROLS - 6.0L - ALTERNATIVE FUELS (INTRODUCTION))COMPONENT LOCATORENGINE CONTROLS CONNECTOR END VIEWS
2003 Chevrolet TrailBlazer 4.2 S, 4WD

Engine Controls Connector End Views

2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Engine Controls Connector End Views
WARNING: This page is about a different car, the 2004 GMC Sierra and 2004 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
C002

GM632342Courtesy of GENERAL MOTORS CORP.
GM632344Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • 15326847
  • 10-Way M GT 150 Sealed (BK)
 Connector Part Information
  • 15326842
  • 10-Way F GT 150 Sealed (BK)
Pin Wire Color Circuit No. Function Pin Wire Color Circuit No. Function
A D-GN/WH 890 FTP Signal A D-GN/WH 890 FTP Signal
B D-BU 1578 FTT Signal B D-BU 1578 FTT Signal
C GY 470 Low Reference C -
GY		 470 Low Reference
D TN 474 5-Volt Reference D TN 474 5-Volt Reference
E PK/BK 462 FICM Status E PK/BK 462 FICM Status
F OR 440 Battery Positive Voltage F OR 440 Battery Positive Voltage
G WH 790 PWM Signal G WH 790 PWM Signal
H PK 1020 Ignition 0 Voltage H PK 1020 Ignition 0 Voltage
J RD 2531 AFO Enable J RD 2531 AFO Enable
K PK 439 Ignition 1 Voltage K PK 439 Ignition 1 Voltage
C003

GM847206Courtesy of GENERAL MOTORS CORP.
GM847206Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • 12040977
  • 3-Way F Metri-pack 280 Series (BK)
 Connector Part Information
  • 12103075
  • 3-Way M Metri-pack 280 Series (BK)
Pin Wire Color Circuit No. Function Pin Wire Color Circuit No. Function
A BK 451 Ground A BK 451 Ground
B BK 350 Ground B BK 350 Ground
C - - Not Used C - - Not Used
C004

GM684916Courtesy of GENERAL MOTORS CORP.
GM646400Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • 15326840
  • 8-Way M GT 150 Sealed (BK)
 Connector Part Information
  • 15326835
  • 8-Way F GT 150 Sealed (BK)
Pin Wire Color Circuit No. Function Pin Wire Color Circuit No. Function
A BK 1744 Fuel Injector 1 PCM Signal A BK 1744 Fuel Injector 1 PCM Signal
B PK/BK 1746 Fuel Injector 3 PCM Signal B PK/BK 1746 Fuel Injector 3 PCM Signal
C BK/WH 845 Fuel Injector 5 PCM Signal C BK/WH 845 Fuel Injector 5 PCM Signal
D RD/BK 877 Fuel Injector 7 PCM Signal D RD/BK 877 Fuel Injector 7 PCM Signal
E L-GN/BK 1745 Fuel Injector 2 PCM Signal E L-GN/BK 1745 Fuel Injector 2 PCM Signal
F L-BU/BK 844 Fuel Injector 4 PCM Signal F L-BU/BK 844 Fuel Injector 4 PCM Signal
G YE/BK 846 Fuel Injector 6 PCM Signal G YE/BK 846 Fuel Injector 6 PCM Signal
H D-BU/WH 878 Fuel Injector 8 PCM Signal H D-BU/WH 878 Fuel Injector 8 PCM Signal
C005

GM646400Courtesy of GENERAL MOTORS CORP.
GM684916Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • 15326835
  • 8-Way F GT 150 Sealed (BK)
 Connector Part Information
  • 15326840
  • 8-Way M GT 150 Sealed (BK)
Pin Wire Color Circuit No. Function Pin Wire Color Circuit No. Function
A BK 1744 Gasoline Fuel Injector 1 Control A BK 1744 Gasoline Fuel Injector 1 Control
B PK/BK 1746 Gasoline Fuel Injector 3 Control B PK/BK 1746 Gasoline Fuel Injector 3 Control
C BK/WH 845 Gasoline Fuel Injector 5 Control C BK/WH 845 Gasoline Fuel Injector 5 Control
D RD/BK 877 Gasoline Fuel Injector 7 Control D RD/BK 877 Gasoline Fuel Injector 7 Control
E L-GN/BK 1745 Gasoline Fuel Injector 2 Control E L-GN/BK 1745 Gasoline Fuel Injector 2 Control
F L-BU/BK 844 Gasoline Fuel Injector 4 Control F L-BU/BK 844 Gasoline Fuel Injector 4 Control
G YE/BK 846 Gasoline Fuel Injector 6 Control G YE/BK 846 Gasoline Fuel Injector 6 Control
H D-BU/WH 878 Gasoline Fuel Injector 8 Control H D-BU/WH 878 Gasoline Fuel Injector 8 Control
C006

GM886053Courtesy of GENERAL MOTORS CORP.
GM646396Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • 15326830
  • 6-Way F GT 150 Sealed (BK)
 Connector Part Information
  • 15326833
  • 6-Way M GT 150 Sealed (BK)
Pin Wire Color Circuit No. Function Pin Wire Color Circuit No. Function
A PK 1039 Injector 1/3 Ignition Voltage A PK 1039 Injector 1/3 Ignition Voltage
B BK 1744 Gasoline Fuel Injector 1 Control B BK 1744 Gasoline Fuel Injector 1 Control
C PK/BK 1746 Gasoline Fuel Injector 3 Control C PK/BK 1746 Gasoline Fuel Injector 3 Control
D BK/WH 845 Gasoline Fuel Injector 5 Control D BK/WH 845 Gasoline Fuel Injector 5 Control
E RD/BK 877 Gasoline Fuel Injector 7 Control E RD/BK 877 Gasoline Fuel Injector 7 Control
F PK 1039 Injectors 5/7 Ignition Voltage F PK 1039 Injectors 5/7 Ignition Voltage
C007

GM886053Courtesy of GENERAL MOTORS CORP.
GM646396Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • 15326830
  • 6-Way F GT 150 Sealed (BK)
 Connector Part Information
  • 15326833
  • 6-Way M GT 150 Sealed (BK)
Pin Wire Color Circuit No. Function Pin Wire Color Circuit No. Function
A PK 1239 Injectors 2/4 Ignition Voltage A PK 1239 Injectors 2/4 Ignition Voltage
B L-GN/BK 1745 Gasoline Fuel Injector 2 Control B L-GN/BK 1745 Gasoline Fuel Injector 2 Control
C L-BU/BK 844 Gasoline Fuel Injector 4 Control C L-BU/BK 844 Gasoline Fuel Injector 4 Control
D YE/BK 846 Gasoline Fuel Injector 6 Control D YE/BK 846 Gasoline Fuel Injector 6 Control
E D-BU/WH 878 Gasoline Fuel Injector 8 Control E D-BU/WH 878 Gasoline Fuel Injector 8 Control
F PK 1239 Injectors 6/8 Ignition Voltage F PK 1239 Injectors 6/8 Ignition Voltage
C008

GM646400Courtesy of GENERAL MOTORS CORP.
GM684916Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • 15326835
  • 8-Way F GT 150 Sealed (BK)
 Connector Part Information
  • 15326840
  • 8-Way M GT 150 Sealed (BK)
Pin Wire Color Circuit No. Function Pin Wire Color Circuit No. Function
A D-GN 890 FTP Signal A D-GN 890 FTP Signal
B PK 1580 HPL Solenoid Control B PK 1580 HPL Solenoid Control
C YE 1578 FTT Signal C YE 1578 FTT Signal
D - - Not Used D - - Not Used
E GY 120 LPL Solenoid Ignition Voltage E GY 120 LPL Solenoid Ignition Voltage
F BK 470 Low Reference F BK 470 Low Reference
G GY 474 5-Volt Reference G GY 474 5-Volt Reference
H - - Not Used H - - Not Used
C009

GM646400Courtesy of GENERAL MOTORS CORP.
GM684916Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • 15326835
  • 8-Way F GT 150 Sealed (BK)
 Connector Part Information
  • 15326840
  • 8-Way M GT 150 Sealed (BK)
Pin Wire Color Circuit No. Function Pin Wire Color Circuit No. Function
A D-GN 890 FTP Signal A D-GN 890 FTP Signal
B PK 1580 HPL Solenoid Control B PK 1580 HPL Solenoid Control
C YE 1578 FTT Signal C YE 1578 FTT Signal
D - - Not Used D - - Not Used
E GY 120 HPL Solenoid Ignition Voltage E GY 120 HPL Solenoid Ignition Voltage
F BK 470 Low Reference F BK 470 Low Reference
G GY 474 5-Volt Reference G GY 474 5-Volt Reference
H - - Not Used H - - Not Used
C010

GM523630Courtesy of GENERAL MOTORS CORP.
GM632349Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • 15326801
  • 2-Way F GT 150 Sealed (BK)
 Connector Part Information
  • 15326806
  • 2-Way M GT 150 Sealed (BK)
Pin Wire Color Circuit No. Function Pin Wire Color Circuit No. Function
A - - Not Used A - - Not Used
B PU/WH 455 Fuel Gage Select Switch Signal B PU/WH 455 Fuel Gage Select Switch Signal
Fuel Rail Temperature Sensor

GM237066Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • 12162194
  • 2-Way F Metri-Pack 150.2 Series, P2S (BK)
Pin Wire Color Circuit No. Function
A GY 470 Low Reference
B YE 1578 Sensor Signal
Fuel Rail Pressure Sensor

GM62485Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • 12078090
  • 3-Way F Metri-Pack Sealed 150 Series (BK)
Pin Wire Color Circuit No. Function
A BK 470 Low Reference
B GY 4741 5-Volt Reference
C D-BU 2670 Sensor Signal
AF Fuel Injector #1

GM684833Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • 61890553
  • 2-Way F Sumitomo (BK)
Pin Wire Color Circuit No. Function
A PK 2539 Injector Power
B BK 1744 Injector Control
AF Fuel Injector #3

GM684833Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • 61890553
  • 2-Way F Sumitomo (BK)
Pin Wire Color Circuit No. Function
A PK 2539 Injector Power
B PK/BK 1746 Injector Control
AF Fuel Injector #5

GM684833Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • 61890553
  • 2-Way F Sumitomo (BK)
Pin Wire Color Circuit No. Function
A PK 2539 Injector Power
B BK/WH 845 Injector Control
AF Fuel Injector #7

GM684833Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • 61890553
  • 2-Way F Sumitomo (BK)
Pin Wire Color Circuit No. Function
A PK 2539 Injector Power
B BK/WH 877 Injector Control
AF Fuel Injector #2

GM684833Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • 61890553
  • 2-Way F Sumitomo (BK)
Pin Wire Color Circuit No. Function
A PK 2739 Injector Power
B L-GN/BK 1745 Injector Control
AF Fuel Injector #4

GM684833Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • 61890553
  • 2-Way F Sumitomo (BK)
Pin Wire Color Circuit No. Function
A PK 2739 Injector Power
B L-BU 844 Injector Control
AF Fuel Injector #6

GM684833Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • 61890553
  • 2-Way F Sumitomo (BK)
Pin Wire Color Circuit No. Function
A PK 2739 Injector Power
B YE/BK 846 Injector Control
AF Fuel Injector #8

GM684833Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • 61890553
  • 2-Way F Sumitomo (BK)
Pin Wire Color Circuit No. Function
A PK 2739 Injector Power
B D-BU/WH 878 Injector Control
AF Lock-Off Relay

GM535912Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • 12129716
  • 4-Way F Sealed Flexlock 280 Series (M-GY)
Pin Wire Color Circuit No. Function
30 OR 2640 Battery Power
85 PK 439 Ignition Power
86 BK 2150 Ground
87 GY 120 Lock-Off Power
87A - - Not Used
Low Pressure Lock-Off Solenoid

GM236598Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • 12052641
  • 2-Way F Metri-Pack Sealed 150 Series (BK)
Pin Wire Color Circuit No. Function
A GY 120 Solenoid Power
B -
D-BU		 313 Solenoid Control
High Pressure Lock-Off Solenoid

GM236598Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • 12052641
  • 2-Way F Metri-Pack Sealed 150 Series (BK)
Pin Wire Color Circuit No. Function
A GY 120 Solenoid Power
B PK 1580 Solenoid Control
Fuel Tank Temperature

GM236598Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • 12052644
  • 2-Way F Metri-Pack Sealed 150 Series (L-GY)
Pin Wire Color Circuit No. Function
A BK 470 Low Reference
B YE 1578 Sensor Signal
AF Fuel Tank Pressure

GM62485Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • 12078090
  • 3-Way F Metri-Pack Sealed 150 Series (BK)
Pin Wire Color Circuit No. Function
A BK 470 Low Reference
B GY 474 5-Volt Reference
C D-GN 890 Sensor Signal
Fuel Gage Select Switch

GM130718Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • 12129716
  • 5-Way F Metri-Pack 150 Series (BK)
Pin Wire Color Circuit No. Function
A BN/WH 230 Illumination Power
B - - Not Used
C BK 1050 Ground
D PU/WH 455 Switch Signal
E - - Not Used
RENDER: 1.0x

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  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.